Fed Decision in September?

Platform comparison

Market context

The Federal Reserve’s September meeting is the event that will set this market, with the upper bound of the target range measured against the pre-meeting level and rounded to the nearest 25 basis points if needed. The current policy rate is 3.50%-3.75%, and the September 2026 FOMC meeting is scheduled for 15-16 September, with the decision due on 16 September and a press conference afterwards.[1][10][14]

For probability calibration, the useful analogue is the July 2026 meeting, when the Fed held rates at 3.50%-3.75% in a split vote, despite some participants favouring a rise.[5][8][13] That matters for trading because a 1% crowd-implied YES on a change is far below the market’s own recent pricing and even below the range of views reported after July, when futures-based tools and market commentary were discussing a meaningful chance of a September hike rather than an almost-certain hold.[4][8][17] Programmatically, this is the sort of contract where a rules-based bot would map the announced upper bound to the nearest 25 bp bracket immediately at 2:00 pm Eastern.

The main catalysts are the inflation, labour and energy prints that land before the meeting, plus any change in Fed communication after the late-July decision. Reuters reported that traders had been repricing September after the July statement and press conference, while other coverage pointed to June CPI cooling but persistent uncertainty around energy-driven inflation.[4][3][17] For a tooling workflow, the practical dependencies are the FOMC calendar, the statement release, the dot plot in September, and the press conference language; those are the inputs a conditional order or alert bot would watch to distinguish a hold from a 25 bp move.[1][10][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Fed Decision in September? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.